From Longman Dictionary of Contemporary Englishincredulousin‧cred‧u‧lous /ɪnˈkredjələs $ -dʒə-/ adjective BELIEVEunable or unwilling to believe something ‘You sold the car?’ she asked, incredulous.incredulous look/expression/voice etc She shot him an incredulous look. —incredulously adverb
Examples from the Corpusincredulous• With a flourish he removed the cover and revealed to the incredulous eyes of the staff a feast of sausages and bacon.• In view of the latter's steady, incredulous gaze, I could not blame him.• The announcement was met by incredulous laughter.• "A millionaire!" she was incredulous. "Like hell he is!"• A sob rose in his throat, blending with an incredulous, nervous giggle framed by his lips.• The judges were so incredulous they twice remeasured the length of the course.• I came to sensible awareness; to incredulous understanding.• Everyone looked incredulous when I said I used to drive a taxi.• "You don't have a car?" asked one incredulous woman.